The LoL player and coach Saskio kept track of his female players’ hormone cycles for months in League of Legends. On X he claims to have noticed impacts on gameplay behavior and win rate.
What did the coach do? The LoL player and part-time coach Tony Chau, aka Saskio, went viral on X (formerly Twitter) with the claim that he documented his duo partner’s monthly cycle for months. In a post from April 13, 2026, he claimed that his partner Yuulu is a completely different player when she has her period.
Cycle reportedly affects gameplay behavior and win rate
This is what he claims to have discovered: Saskio asserts that the cycle has significant effects on the gameplay behavior of his duo partners. Player Yuulu plays significantly more aggressively during her period. Therefore, he would choose the champ Tristana even then and dive into fights with her:
“I match her chaos with my chaos. When she flashes forward, I flash with her. We both commit war crimes at the SAME TIME.”
However, outside of menstruation, things look quite different: Yuulu suddenly plays methodically and calculated, and dies less often. Then he chooses Vayne and waits for good opportunities for a fight. This approach impacts the win rate: during the period it is at 52%, outside it shoots up to 57.5%.
Saskio says: “The data doesn’t lie.” He recorded over 147 matches. His predictions are so accurate that he can now predict Yuulu’s period more precisely than her own tracking app.
In an article on X, Saskio goes into more detail about the “science” behind his approach.
This is what is being discussed: The mood in the nearly 250 comments on X can be summarized as follows: “Fascinating … but pretty creepy.” Users are amused by the premise and impressed by the attention to detail, but also criticize that Saskio apparently neither obtained his teammate’s consent to track this personal data nor to share it with the public. After all, the post has now been seen over 3.5 million times.
How scientific is this whole thing? Saskio’s approach should not be confused with actual scientific work. 147 matches may seem like a lot, but as a sample, it is relatively small and has limited statistical significance, especially considering external factors such as day form and teammates. Anyone who has ever tackled a PvP game is painfully aware of the influence of matchmaking.
Nevertheless, the basic idea has a scientific basis. A study from University College London from 2025 suggests that the hormonal cycle may actually affect the athletic performance of female individuals.
However, the results differ from the data of the LoL coach: women tend to perform particularly well on cognitive tests during ovulation, while reaction time is fastest during their period — even though participants reported feeling their worst physically during this time.
Even if the coach’s method may seem entertaining at first glance, it should not be forgotten that women in e-sports already struggle with stereotypes and prejudices without period tracking: “Unfortunately, this is everyday life” – LoL player gets rejected because of her gender, even though she was the best choice
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